摘要:
The present invention discloses fluoride-releasing strips for caries prevention, wherein the fluoride-releasing strips comprises a colloidal fluoride-containing solution for releasing fluorine ion and a support substrate. A colloidal fluoride-containing solution comprises a fluoride solution, at least one buffer, at least one moisturizer and a carboxymethyl cellulose (CMC). The concentration of fluoride ions in said colloidal fluoride-containing solution ranges from 2500 ppm to ppm. The support substrate is waterproof material and the colloidal fluoride-containing solution is applied on the support substrate.
摘要:
Asymmetric TPX porous membranes for gas separation are prepared by wet, and dry/wet phase inversion methods. A casting polymer solution including TPX, a selected solvent and optionally a selected non-solvent, is casted on a support, and within 100 seconds after the casting step, the casted polymer is immersed in a coagulant to form a membrane. The formed membrane is extracted, dried and optionally heat treated.
摘要:
The present invention provides a process for the removal and recovery of indium from waste waters and process streams. The process of the present invention utilizes a combination of a supported liquid membrane (SLM) and a strip dispersion to improve extraction of indium while increasing membrane stability and decreasing processing costs. This novel process selectively removes indium from the feed stream, provides the increased flexibility of aqueous strip/organic volume ratio, and produces a concentrated strip solution of indium.
摘要:
The present invention discloses a feed spacer, comprising a first layer and a second layer, for spiral-wound membrane module. The first layer consists of a plurality of first filaments, which are substantially in parallel to one another. Furthermore, the second layer also consists of a plurality of second filaments, which are substantially in parallel to one another. Moreover, the first layer is attached to the second layer, and the first filaments are disposed at an angle to the second filaments. Both the first layer and the second layer bend to the center of the spiral-wound. Additionally, the distance from the inside of the first layer to the center is bigger than that from the inside of the second layer to the center, and the diameter of the first filament is smaller than that of the second filament.
摘要:
The present invention discloses a method for characterizing a membrane in a wet condition using a positron annihilation spectrometer and a sample holder thereof. Positron annihilation lifetime spectroscopy (PALS) has been know to be an invaluable tool for investigating local free-volume hole properties in various materials. Accompanying with the method and sample holder disclosed by the invention, PAS and PALS can measure the properties of various materials, such as free volume and layer structures both in the dry and wet states.
摘要:
The present invention discloses an adjustable film applicator which comprises an applicator body, a first knife, a second knife, a first fixing apparatus, a second fixing apparatus, a pair of first adjusting screws, and a pair of second adjusting screws. The first and second knife are adjusted to a first and second height by adjusting the first and second adjusting screws, wherein the second height is greater than the first height.
摘要:
The present invention discloses methods and systems for measuring the zeta potential of the cylinder's outer surface and the inside surface of the tube. In the measuring cell for measuring the zeta potential of the cylinder's outer surface, the cylinder is placed coaxially inside the reference tube, and the channel existing between the cylinder and the reference tube forms a annular flow channel. Additionally, in the measuring cell for measuring the inside surface of the tube, a reference cylinder is held coaxially inside the tube and a given solution is forced to flow through the annular space between the tube and the reference cylinder.
摘要:
The present invention discloses discloses a composite PTFE membrane comprising an expanded PTFE membrane as substrate and a sintered porous PTFE membrane on top of it. The porous PTFE membrane on top has porous structure with interconnected channels formed with a sintering process that fuses the PTFE fine powders coated on the ePTFE membrane. Furthermore, the present invention discloses a method for forming the composite PTFE membrane.
摘要:
The present invention discloses a method for modificating a fluoropolymer. First, a fluoropolymer is provided, and then a hydrogen plasma treatment is performed on the fluoropolymer, so that C—H group is introduced to the surface of the fluoropolymer to form an intermediate. Next, an ozone treatment is performed on the intermediate, wherein the C—H group serves as ozone accessible site to form peroxide, and a first modified fluoropolymer is then formed. Finally, a grafting polymerization is initiated from the peroxide of the first modified fluoropolymer in the presence of a composition comprising at least one functional monomer, so as to form a second modified fluoropolymer. Furthermore, this invention also discloses methods for fabricating metal-clad laminates.
摘要:
The present invention discloses discloses a composite PTFE membrane comprising an expanded PTFE membrane as substrate and a sintered porous PTFE membrane on top of it. The porous PTFE membrane on top has porous structure with interconnected channels formed with a sintering process that fuses the PTFE fine powders coated on the ePTFE membrane. Furthermore, the present invention discloses a method for forming the composite PTFE membrane.